Apple's just-posted job creation page actually says the iPhone uses Corning glass. It's been one of the worst kept secrets in mobile technology, with Apple never admitting to using it and Corning would never admitting to Apple using it. (We've asked them every year at CES and gotten nothing but nervous smiles and subject changes in return.) Former Apple employees have mentioned it, but there's been no official confirmation of it. Until now.
Corning employees in Kentucky and New York who create the majority of the glass for iPhone
It doesn't say iPad, which is curious, nor does is say Gorilla Glass specifically, though that's what Corning is famous for. Many of Apple's competitors have touted their use of Gorilla Glass in device specs for years, but that's not how iPhones and iPads are marketed.
Still, for gadget nerds, it's nice to be able to lay this bit of obfuscation to rest.